Extracting apparatus.



H0 MODEL.

- PATBNTED JULY 7, 1903. E HEIMANN.

EXTRACTING APPARATUS.

APPLICATION IILED sum. 20. 1902.

UNITED STATES Patented July 7, 1903.

PATENT OFFICE.

EXTRACTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 733,200, dated July 7, 1903.

Application filed September 20, 1902. Serial No. 124,223. (No model.)

T0 at whom, it may concern.-

Be it known that I, EMANUEL HEIMANN, engineer, a subject of the King of Prussia, Emperor of Germany, residing at Brunswick, Duchy of Brunswick, Germany, have invented certain new and useful Improvements in Extracting Apparatus, of which the following is a specification.

This invention relates to extracting apparatus.

The object of the invention is the provision of an apparatus including means for extracting the prime constituents of the material under treatment by employing a solvent, means for withdrawing the solvent from the receptacle containing the material under treatment, means for distilling or evaporating said solvent, means for surrounding the receptacle or receptacles containing the material under treatment with the fumes or vapors of said distilled or evaporated solvent, means for passing said fumes or vapors through a condenser to reduce them to liquid condition, and means for again supplying said solvent in liquid condition to the receptacle containing the material under treatment.

Referring to the accompanying drawings, forming a part of this specification, Figure 1 represents in elevation an apparatus constructed according to my invention; and Fig. 2 is a plan view of the receptacles containing the material under treatment, the casing surrounding said receptacles, and the pipes com municating with said casing and receptacles.

The apparatus, briefly described, comprises a casing, a plurality of extracting-receptacles in said casing, a siphon leading from each of said receptacles and communicating with a distiller or evaporator, a pipe leading from said distiller or evaporator and communicating with the said casing, a pipe leading from said casing and communicating with a condenser, and a pipe leading from said condenser and communicating with each of the receptacles in said casing.

The reference character A indicates the extracting apparatus proper, B the distiller or evaporator, and G the condenser.

Referring to Fig. 1, the reference character 0. indicates the casing of the extracting apparatus. Within this casing is disposed a plurality of receptacles 79 (shown in dotted lines) for containing the'materia'l under treatment. Each of the receptacles b is provided at its top with a hinged door 0 and at its bottom with a hinged door i, each of the doors 1' being provided with a counterweight, as shown.

Leading from an outwardly-extending portion or chamber 2" at the lower end of each receptacle b is a siphon e, which is disposed on the outside of the casing a and empties into a pipe in, communicating with the dis-.

tiller or evaporator B. A delivery-pipe fextends from the upper end of the distiller or evaporator B to the casing a and delivers vapors or fumes generated in said distiller or evaporator to the casing a, which vapors or casing a through branch pipes h is a pipe h. i

It will be understood, of course, that any preferred form of distiller or evaporator B and condenser C may be employed, and as the particular construction of these devices forms no part of my present invention I have only illustrated them conventionally.

Constructed as above described the operation of my improved apparatus is as follows: A quantity of the material which is to be treated is placed in one of the receptacles b by means of its hinged door a. Any preferred character of liquid solvent is then fed to said receptacle 6 and permitted to extract or dissolve out the prime constituents of the material under treatment. When the solvent in the receptacle 1) reaches a level equal to the highest point of. the siphon e, which leads from the particular receptacle 1) being used, said solvent overflows through said siphon into the pipe 70 and is conducted thereby into the evaporator or distiller B, where it is converted into vapor or fume and conducted by the pipe f to the casing a. Within the casing a the hot fumes or vapors from the distiller or evaporator B surround the receptacle or receptacles b in said casing and materially aid in heating said receptacles,

whereby the action of the solvent upon the material being treated is facilitated. From the casing a thefumes or vapors of the distilled or evaporated solvent are conducted to the condenser C by the pipe g. In the condenser O the evaporated solvent is once more reduced to liquid condition and fiows through the pipe h to the particular receptacle 1) containing the material under treatment. Said solvent then overfiows again through the siphon e, and the operation continues, as before, in a cycle.

When the constituents of the material under treatment in one of the receptacles b are nearly all extracted by the solvent with which said material has been treated, a pressing or squeezing action is exerted upon said material in any desired manner to express therefrom any of the solvent which may remain therein. This pressing or squeezing of the material in the receptacle Z7 forces all the solvent contained therein to pass through the siphon 6 into the delivery-pipe 1c of the distiller or evaporator. The squeezed or compressed material in the casing a may be permitted to remain therein a sufficient length of time to be dried by heat generated within the casing to around the receptacles Z) by the fumes or vapors delivered from the evaporator B. I'Vhen completely dried, the material in the receptacleb is removed therefrom through the lower counterbalanced door 41.

During the extracting operation any vapor which may be generated in the receptacle I) through the evaporation of the solvent contained in said receptacle by the heat of the apparatus is conducted through the branch pipe g, leading from said receptacle, into the main pipe g, and from said main pipe is delivered to the condenser 0, wherein it is condensed, being afterward conducted by the pipe h back to the receptacle Z). By means of this construction it will be seen that no loss of solvent through evaporation is possible.

In working my improved apparatus it will be understood that one of the receptacles b is first placed in operation, and after the extracting operation therein has been about one-fourth completed a second receptacle b is placed in operation, as described with respect to the first receptacle. IVhen the extracting operation in the second receptacle has been about one-fourth completed, a third receptacle is placed in operation, and so on. It will be understood, of course, that this method of working is adapted for the apparatus when four receptacles Z) are employed, as shown; but it Will be understood that any desired number of receptacles b may be employed without departing from the spirit of my invention, and the method of Working will of course be made to correspond with the number of receptacles employed.

The receptacles b are placed in operation one after the other in regular order for the purpose of preventing the apparatus from becoming cooled during the removal of the completely-treated material from the receptacles b. If all of the receptacles b were discharged and refilled at the same time, the apparatus would have an opportunity to become cool and much inherent heat would thus be lost.

From the foregoing description it will be seen that the operation of my extracting apparatus is practically continuous and that by its employment I am enabled to thoroughly extract all the valuable or prime constituents of the material under treatment without loss of time or heat. a

It will be understood that the receptacles b may be heated in any desired mannersuch, for instance, as by employing steamcoils or the like. As such methods of heating receptacles, however, are old and wellknown in the art, and as they form no part of my present invention, I have not deemed it necessary to illustrate them in the drawings.

If desired, I may dispense with the distiller or evaporator B, and by elevating the lower end of the receptacle 7) above the bottom of the casing a and applying heat to the bottom of said casing convert said casing into a condenser, which will in all essential respects perform the function of the distiller or evaporator B. It will be understood that the receptacles b are elevated above the bottom of the casing a in order that the siphons 6 may discharge the solvent contents of said receptacles 1) into the lower portion of the casing a, wherein they are converted into fume or vapor and surround said receptacles I), thus effectually heating the receptacles and aiding the extracting operation.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. An extracting apparatus comprising a jacket-casing; a receptacle therein, the up per end of which is closed normally; an evaporator; and a condenser; said receptacle communicating with said evaporator; said evapo rator with said casing; said casing with said condenser; and said condenser with said receptacle.

2. An extracting apparatus comprising a jacket-casing; a receptacle therein; doors on the upper and lower ends of said receptacle; an evaporator; and a condenser; said receptacle communicating with said evaporator; said evaporator with said casing; said casing with said condenser; and said condenser with said receptacle.

3. An extracting apparatus comprising a jacket-casing; a receptacle therein; doors on the upper and lower ends of said receptacle; an evaporator; and a condenser; said receptacle communicating at its upper end with said condenser, and between its upper and lower ends with said evaporator; said evaporator communicating with said casing; said casing with said condenser; and said condenser with said receptacle by a passage inraeoo said condenser and each of said receptacles; said communications being independent of I5 each other and one terminating in each of said receptacles in a lower plane than the other.

In testimony whereof I have hereunto set my hand in presence of two subscribing wit- 2o nesses.

EMANUEL I-IEIMANN.

Witnesses:

WILHELM LEHRKE, J. SEoKEL. 

